class template

std::greater

template <class T> struct greater;

Function object class for greater-than inequality comparison

Binary function object class whose call returns whether the its first argument compares greater than the second (as returned by operator >).

Generically, function objects are instances of a class with member function operator() defined. This member function allows the object to be used with the same syntax as a function call.

It is defined with the same behavior as:

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template <class T> struct greater : binary_function <T,T,bool> {
  bool operator() (const T& x, const T& y) const {return x>y;}
};

template <class T> struct greater {
  bool operator() (const T& x, const T& y) const {return x>y;}
  typedef T first_argument_type;
  typedef T second_argument_type;
  typedef bool result_type;
};

Objects of this class can be used on standard algorithms such as sort, merge or lower_bound.

Template parameters

T: Type of the arguments to compare by the functional call.
The type shall support the operation (operator>).

Member types

member type	definition	notes
`first_argument_type`	`T`	Type of the first argument in member `operator()`
`second_argument_type`	`T`	Type of the second argument in member `operator()`
`result_type`	`bool`	Type returned by member `operator()`

Member functions

bool operator() (const T& x, const T& y): Member function returning whether the first argument compares greater than the second (x>y).

Example

// greater example
#include <iostream>     // std::cout
#include <functional>   // std::greater
#include <algorithm>    // std::sort

int main () {
  int numbers[]={20,40,50,10,30};
  std::sort (numbers, numbers+5, std::greater<int>());
  for (int i=0; i<5; i++)
    std::cout << numbers[i] << ' ';
  std::cout << '\n';
  return 0;
}